op 	 {
  name: "DistributedSave"
  input_arg {
    name: "dataset"
    type: DT_VARIANT
  }
  input_arg {
    name: "directory"
    type: DT_STRING
  }
  input_arg {
    name: "address"
    type: DT_STRING
  }
  attr {
    name: "metadata"
    type: "string"
    default_value {
      s: ""
    }
  }
  is_stateful: true
}
